RU94024079A - Method of producing the sintered solid alloy based on tungsten carbide - Google Patents

Abstract

FIELD: powdery metallurgy. SUBSTANCE: to the parent tungsten trioxide powder tungsten carbide powder is added (mean grain size is 1.5 mc, not above) at amount 3-10 wt.-% of tungsten carbide in alloy, mixed, reduced to tungsten followed by carbidizing treatment. Charge is prepared by the combined wet grinding tungsten carbide and metallic binding agent. Before mixing and grinding tantalum carbide and/or vanadium carbide and "high-temperature" tungsten carbide (grain size is 10 mc, not less) can be added to the charge. Blanks were pressed from the charge of necessary sizes and sintered at the corresponding temperatures. EFFECT: improved method of producing, high quality of alloy, simplified method. 4 cl, 1 tbl

Claims (1)

The invention relates to powder metallurgy. The method is as follows. Tungsten carbide powder is added to the initial tungsten trioxide powder with an average grain size of not more than 1.5 microns in an amount of 3-10 wt. % with respect to tungsten carbide in the alloy, mixed and reduced to tungsten, and then carry out carbidization. The mixture is prepared by joint wet grinding of tungsten carbide and a metal binder. Before mixing and grinding, tantalum carbide and / or vanadium carbide can be added to the charge. Before mixing and grinding the tungsten carbide with the metal binder, “high temperature” tungsten carbide with a grain size of at least 10 μm can be added to the charge. Billets of the required size are pressed from the charge and sintered at appropriate temperatures. The implementation of the method provides a hard alloy with high operational stability under shock and alternating loads while reducing the complexity of the operation of grinding mixtures.